| Description |
There is a vulnerability in the Linux kernel versions higher than 5.2 and before version 5.11 (if the kernel is compiled with config params CONFIG_BPF_SYSCALL=y , CONFIG_BPF=y , CONFIG_CGROUPS=y , CONFIG_CGROUP_BPF=y , CONFIG_HARDENED_USERCOPY not set, and BPF hook to getsockopt is registered). As result of BPF execution, the local user can trigger a bug in __cgroup_bpf_run_filter_getsockopt() function that can lead to a heap overflow (because of non-hardened usercopy). The impact of the attack could be a denial of service or possibly privilege escalation. |